package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.mapper.DishMapper;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.web.bind.annotation.RequestParam;

import java.util.List;
import java.util.stream.Collectors;

@Service
@Slf4j
public class DishServiceImpl extends ServiceImpl<DishMapper, Dish> implements DishService {

    @Autowired
    DishFlavorService dishFlavorService;

    @Autowired
    DishService dishService;

    /**
     * 新增菜品，保存口味
     * @param dishDto
     */
    @Transactional
    public void saveWihtFlavor(DishDto dishDto) {

        //保存菜品基本信息到菜品表dish;
        this.save(dishDto);

        //获取保存的菜品ID;
        Long dishDtoId = dishDto.getId(); // 菜品id
        //获取菜品口味列表，遍历列表，为菜品口味对象属性dishId赋值;
        List<DishFlavor> flavors = dishDto.getFlavors();
        for (DishFlavor flavor : flavors) {
            flavor.setDishId(dishDtoId);
        }
        //批量保存菜品口味列表;
        dishFlavorService.saveBatch(flavors);
    }

    /**
     * 根据id查询菜品信息和对应口味信息
     * @param id
     * @return
     */
    public DishDto getByIdWithFlavor(Long id) {
        //查询菜品基本信息，从dish表查询
        Dish dish = this.getById(id);
        DishDto dishDto = new DishDto();
        BeanUtils.copyProperties(dish,dishDto);

        //查询当前菜品口味信息，从 dish_flavor表查询
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dish.getId());
        List<DishFlavor> flavors = dishFlavorService.list(queryWrapper);
        dishDto.setFlavors(flavors);
        return dishDto;
    }

    @Override
    @Transactional
    public void updateWithFlavor(DishDto dishDto) {

        //更细dish表基本信息
        this.updateById(dishDto);
        //清理当前菜品对应口味数据  dish_flavor表的 delete操作
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(DishFlavor::getDishId,dishDto.getId());

        dishFlavorService.remove(queryWrapper);

        //添加当前提交过来的口味数据 dish_flavor表的 insert操作
        List<DishFlavor> flavors = dishDto.getFlavors();

        flavors = flavors.stream().map((item)->{
            item.setDishId(dishDto.getId());
            return item;
        }).collect(Collectors.toList());
        dishFlavorService.saveBatch(flavors);
    }


    /**
     * 批量删除菜品
     * @param ids
     */
    @Override
    @Transactional
    public void deleteById(@RequestParam List<Long> ids) {
        //构造条件查询器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //查询菜品是否在售卖，如果是抛出业务异常
        queryWrapper.in( ids != null ,Dish::getId,ids);

        List<Dish> list = dishService.list(queryWrapper);
        for (Dish dish : list) {
            //获取售卖状态
            Integer status = dish.getStatus();
            //如果不是在售卖，进行删除功能
            if(status != 1){
                this.removeById(dish.getId());

            }else {
                throw new CustomException("商品售卖中，无法删除");
            }

        }

    }
}
